Frost Chill Cooling
Heating Sensor
Located in the evaporator unit.
This could fail from time to time and prevent the defrost heaters from operating.
This sensor helps to prevent excessive and unnecessary heating during the defrost cycle. If the evaporator is heated too much, especially if the ice has melted but the unit is still in defrost mode, it will cause inefficiency to cool down the evaporator again. It can also cause heat in the room, thus increasing the humidity which can compromise product quality and also promote ice-build on the evaporator.
Possible Solution
Locate the defrost thermostat which is attached to the evaporator coils.
Disconnect the two wires and test it with your multimeter. If the evaporator is at room temperature, you should get a reading. If there is no reading this indicates that the sensor is faulty and will need to be replaced as it’s not turning on the defrost heaters.
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Compressor
Solenoid Valve
Defrost system
Filter Drier
Sight Glass
Thermostat operation
EVAPORATOR fan motor
Evaporator operation
TXV Unit
Condenser fan
Orifice
Heating Element
Drain heater
Suction line drier
Accummulator
CONDENSER fan blade
Interior Lighting
Condenser unit
Oil separator
Heating Sensor
Electrical Wiring
Rotork Service Valve
Compressor starter
Compressor PTC/Klixon
Compressor capacitor
HP/LP sensor
